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| Originally Posted by aquayle I guess the 64K$ question is, can you do 'simple' dives on your computer. This is a bit like 'deco-on-the fly' I guess. I did a 35m dive (profile below) but with very slow ascent took a pony of air because knew it would involve deco - computer says 9mins at ceiling of 3m (and floor of 6m). If no pre-planning on the dive, could you simply rely on the SUUNTO to give you safe enough deco? |
Deco on the fly is a term referring to a set of decompression rules that evolved around a very specific range of gases and a very specific set of decompression rules. A 35m dive would be carried out on Trimix 21/35 using 50% 02 for decompression. There is no other way to do the dive if your using DOTF.
Flying a computer is OK but unless you have a full on decompression computer like a VR2 VR3 Abyss Explorer etc you are going to get some very basic profiles using mainly Bhulman style get shallow quick ascents.
Fo short deco dives this is fine but you need to know what your deco commitment is likely to be and how much gas you will need BEFORE you get in the water. You should never go into deco without pre planning or at least enough experience to just know what you need.
I dived deep air and shallow trimix using a Sunnto Vytec. I used tables to generate the deep stops and I followed the Suunto on the shalow stops but i always knew what my deco would be and how much gas I needed before ever getting on the boat.
As for training I would personaly avoid the ERD course as it is a deep air course that is frankley out of date. Look tawards Advanced Nitrox and Decompresion procedures folowed by entry level Trimix or if you like the DIR
stile of diving and want to do away with your computer do DIRF and Tech1
Both will get you into the 50m range of diving with deco.
ATB
Mark Chase